Citron2001 Posted June 14, 2015 Share Posted June 14, 2015 Hi, I have a 2011 mk3 1.6 125 EURO5 Zetec 5 door, 5spd manual hatchback Focus with Ford Audio, and it's developed a high pitched whine when in AUX mode. Being fobbed off by the dealer with excuses such as it's not fully compatible with my iPhone. Thing is that the noise is apparent even without a phone being connected. Can anyone with the same or similar model please do a quick test for me? Just switch to AUX mode with nothing connected and turn the volume up above half way and let me know if you can hear a high-pitched noise? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
Incontro Posted June 14, 2015 Share Posted June 14, 2015 Although my car is slightly different to yours (Mk2.5 Focus), I do get a slight high-pitched whine on AUX, and it gets higher in pitch the higher the engine revs. Quote Link to comment Share on other sites More sharing options...
Citron2001 Posted June 15, 2015 Author Share Posted June 15, 2015 Although my car is slightly different to yours (Mk2.5 Focus), I do get a slight high-pitched whine on AUX, and it gets higher in pitch the higher the engine revs. Ok - thanks. The noise I hear is constant even without the engine running. Quote Link to comment Share on other sites More sharing options...
WES180 Posted June 20, 2015 Share Posted June 20, 2015 Check if you have left your wi-fi switched on on your phone. I remembered this thread today when for the first time i heard the whine. I turned my wi-fi off and it stopped. Quote Link to comment Share on other sites More sharing options...
Citron2001 Posted June 21, 2015 Author Share Posted June 21, 2015 Check if you have left your wi-fi switched on on your phone. I remembered this thread today when for the first time i heard the whine. I turned my wi-fi off and it stopped. Thanks - one of the garages suggested this, but the noise is present even when there's no phone in the car. I've done some more testing: Using an Android (Samsung Galaxy S3) makes no difference Using a USB stick makes the noise go away Using a 3.5mm jack introduces another electrical interference noise Quote Link to comment Share on other sites More sharing options...
WES180 Posted June 21, 2015 Share Posted June 21, 2015 I had an interference issue with my karaoke set up until i installed a ground loop isolator so maybe it could be an earthing issue with your head unit too? Quote Link to comment Share on other sites More sharing options...
richardc1983 Posted January 17, 2017 Share Posted January 17, 2017 I've got the same issue with a 2012 focus. As soon as I connect my phone to the aux input with the lead the sound goes away. 1 Quote Link to comment Share on other sites More sharing options...
dans34 Posted January 19, 2017 Share Posted January 19, 2017 I also have the same issue with a 2012 focus Quote Link to comment Share on other sites More sharing options...
The Latman Posted January 19, 2017 Share Posted January 19, 2017 I had a 58 plate focus Titanium which had an issue where if I connected anything other than a phone to the AUX socket (iPad or laptop audio) it fried the module on the stereo. Ford replaced the Sony branded head (£1000 in Ford money apparently) unit twice then said "If it happens again we're not touching it". I never used that socket again after that. Quote Link to comment Share on other sites More sharing options...
Russ Posted January 19, 2017 Share Posted January 19, 2017 Got a 2008 titanium, no noise through the aux whatsoever. Could it be picking up interference from something you have connected...ie satnav/dashcam etc? Quote Link to comment Share on other sites More sharing options...
Albert27 Posted January 19, 2017 Share Posted January 19, 2017 On 14/06/2015 at 5:19 PM, Citron2001 said: Hi, I have a 2011 mk3 1.6 125 EURO5 Zetec 5 door, 5spd manual hatchback Focus with Ford Audio, and it's developed a high pitched whine when in AUX mode. Being fobbed off by the dealer with excuses such as it's not fully compatible with my iPhone. Thing is that the noise is apparent even without a phone being connected. Can anyone with the same or similar model please do a quick test for me? Just switch to AUX mode with nothing connected and turn the volume up above half way and let me know if you can hear a high-pitched noise? Thanks in advance! Same on my 2008 Focus, can only hear it when the ford audio is on and in aux mode. Once i put a cable in it plays music fine and the noise goes Quote Link to comment Share on other sites More sharing options...
madmav Posted April 19, 2017 Share Posted April 19, 2017 On 6/14/2015 at 7:03 PM, Incontro said: Although my car is slightly different to yours (Mk2.5 Focus), I do get a slight high-pitched whine on AUX, and it gets higher in pitch the higher the engine revs. Forgive the age-old bump, but I've the exact same issue with my own Zetec S, 2012 MK3, there's a whine when bluetooth songs are at a high volume,it's annoying as the radio is is fine, but when playing music through bluetooth it's there, and I'm pretty sure the pitch is effected by the engine too! Has anyone found a fix for this? It's the only thread I can find on the internet that seems to share my problem! Quote Link to comment Share on other sites More sharing options...
simcor Posted April 19, 2017 Share Posted April 19, 2017 On 21/06/2015 at 1:27 PM, WES180 said: I had an interference issue with my karaoke set up until i installed a ground loop isolator so maybe it could be an earthing issue with your head unit too? Karaoke set up in your car, sounds cool Wes lol Quote Link to comment Share on other sites More sharing options...
Incontro Posted April 19, 2017 Share Posted April 19, 2017 2 hours ago, simcor said: Karaoke set up in your car, sounds cool Wes lol Lol this thread is like 2 years old mate ;) 6 hours ago, madmav said: Forgive the age-old bump, but I've the exact same issue with my own Zetec S, 2012 MK3, there's a whine when bluetooth songs are at a high volume,it's annoying as the radio is is fine, but when playing music through bluetooth it's there, and I'm pretty sure the pitch is effected by the engine too! Has anyone found a fix for this? It's the only thread I can find on the internet that seems to share my problem! Since my last post in this thread, I've replaced the stock Ford 6000CD head-unit with an Android colour touch-screen head unit - I no longer have any whine. What I can suggest is that you turn UP the audio source volume (i.e. your phone's music volume) to near maximum, and then you can turn DOWN your head-unit volume, whilst still having the same amount of volume. This often helps reduce noise in most situations. 2 Quote Link to comment Share on other sites More sharing options...
madmav Posted April 20, 2017 Share Posted April 20, 2017 18 hours ago, Incontro said: Lol this thread is like 2 years old mate ;) Since my last post in this thread, I've replaced the stock Ford 6000CD head-unit with an Android colour touch-screen head unit - I no longer have any whine. What I can suggest is that you turn UP the audio source volume (i.e. your phone's music volume) to near maximum, and then you can turn DOWN your head-unit volume, whilst still having the same amount of volume. This often helps reduce noise in most situations. Ha - I've noted the source volume did help alright, knocking up the volume on my android phone did wonders, but it was still prominent on some slowere genres of songs for example. Might look to replace the head-unit at some stage! Appreciate the response :) Quote Link to comment Share on other sites More sharing options...
englishl1989 Posted January 4, 2018 Share Posted January 4, 2018 I have this exact same issue on my 62 Plate Ford Focus TDCI. Alternator whine when on AUX and streaming via bluetooth. Did anyone actually resolve it on the ford unit ? Quote Link to comment Share on other sites More sharing options...
madmole Posted January 5, 2018 Share Posted January 5, 2018 Mine is silent, but it does have an old iPod permanently plugged in via the USB in the centre console Would suggest you add some extra earthing of the cable to the connector to bodywork, that should remove the induced signal Quote Link to comment Share on other sites More sharing options...
FatHead1979 Posted January 5, 2018 Share Posted January 5, 2018 These types of issues are often caused by bad earthing...similar to when people report not being able to pick up AM radio without massive interference. Anything you can do to try and add an additional earth is surely worth trying, if that doesn't resolve it then I'd suggest it points at your head unit itself as being the culprit. Quote Link to comment Share on other sites More sharing options...
englishl1989 Posted January 6, 2018 Share Posted January 6, 2018 My radio often drops out with SEEKING displayed on the console. It then comes back. Perhaps earthing it will also resolve this! Thanks I will give this a go tomorrow and report back! Quote Link to comment Share on other sites More sharing options...
Olivia Shaw Posted May 21, 2019 Share Posted May 21, 2019 Wondered if anyone could help me!! My Ford Focus 2012 plate makes a horrible buzzing sound when on aux/phone when take phone calls makes a buzzing sound and with aux music. However radio and cd is fine, could anyone help give me advise. I was told to do a master rest but had no clue how to do this and google wasn’t much help. Quote Link to comment Share on other sites More sharing options...
Paulkp Posted May 22, 2019 Share Posted May 22, 2019 If your source is being charged at the same time as you are listening to it, it could well be the charging of your 'phone. As stated above, increasing the volume out of the phone may improve the audio: noise ratio. Your phone is a radio transmitter - bluetooth, wifi, and the mobile network. all these will contribute to the level of noise interference, so ensuring wifi and blue tooth are off may help. Do you have the 'phone close to the radio ? You could try moving it to different positions - I often leave mine at home, or in the boot! Quote Link to comment Share on other sites More sharing options...
Olivia Shaw Posted May 22, 2019 Share Posted May 22, 2019 It has a aux button build in so I connect my phone via bluetooth. I am not using the charging port. It’s a strange one been to see an audio specialist and they seems to think it’s something to do with the software needing updating🤷♀️ Quote Link to comment Share on other sites More sharing options...
Stoney871 Posted May 22, 2019 Share Posted May 22, 2019 If you're using any plug in usb chargers in a power socket then try removing that.Usb chargers chuck out RFI that interferes with all sorts of things.I had problems on a mk2 focus whereby my central locking would not respond and found it was due to a dashcam charger being plugged in.Sent from my SM-G965F (S9+) 1 Quote Link to comment Share on other sites More sharing options...
Stoney871 Posted May 22, 2019 Share Posted May 22, 2019 https://en.m.wikipedia.org/wiki/Electromagnetic_interferenceSent from my SM-G965F (S9+) Quote Link to comment Share on other sites More sharing options...
Cars 1967 Posted November 11, 2020 Share Posted November 11, 2020 Yes I have z mondeo mark 3 snd it makes z whinging noise in aux ? Quote Link to comment Share on other sites More sharing options...
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